Beko DIN15210 overfilling

I have a Beko 15210 which has just stopped working. The flood tray at the base is filling activating the float switch. I have drained the tray and checked all the hoses which appear fine. The inlet plastic unit on the LHS of the unit and salt reservoir was also drained as part of this checking process as I lay the unit on its side and removed the base tray to allow a thorough check of all the hoses. On restarting the machine the water filled via the unit and the salt reservoir and stopped with nothin else happening. I then paused the cycle and then released. The same filling began again and stopped again. I opened the dishwasher door to see what was going on inside …. the inside was full almost to the door level. On closing the door the water started to fill again and then began to overflow via the small clear overflow tubes into the base tray at which point I turned the dishwasher off. Previously I know when it got to this point the float switch activated and then the drain pump cut in to drain the interior of the dishwasher.

Any ideas as to what the problem would be?